UV Cationic Epoxy Adhesive

A UV cationic epoxy adhesive is a one-part epoxy that remains liquid until ultraviolet light starts a cationic cure. Because light triggers the reaction rather than mixing two components, the adhesive offers a long open time on the production line and cures on demand, which suits automated dispensing where parts must be aligned before the bond is fixed.

Cationic epoxy chemistry differs from radical UV acrylics in one useful way: the cure continues into shadowed areas once light exposure stops, so bond lines beneath opaque components can still develop strength. Cure speed depends on light intensity, exposure time, bond-line thickness and how much UV the substrates transmit. These adhesives are used on glass, ceramics, many plastics and prepared metals where a rigid, chemically resistant bond is required.

Selection turns on the substrate combination, the depth of cure needed, the temperature the assembly will see and the dispensing method. Where one surface blocks light, a product that keeps curing in the dark is preferable to a purely light-dependent acrylic. Where substrates are heat sensitive, a UV-triggered cure avoids the oven step that a thermal epoxy would require.

JOME formulates a UV-curable epoxy-based adhesive for light-triggered assembly, listed alongside the rest of the UV cationic epoxy adhesive category. Tell us your substrates and cure depth and we will recommend a grade.

Source UV Cationic Epoxy Adhesive direct from the factory: JOME supports bulk supply and distribution enquiries with full TDS documentation.